tpm is a tiny shell script which is heavily inspired and largely
compatible with pass. Just like pass it uses gpg2 to securely store your
passwords, the major difference between pass and tpm is that the latter is
a lot more minimal. Furthermore, tpm is written entirely in POSIX shell.

Invoking tpm consists of specifying a command either insert or show and
supplying one entry as a target. If insert is specified as a command,
tpm will create a new entry and prompt for the corresponding password. If
you specify show as a command, tpm will write the password for the given
entry to standard output.
